Re: Generator wiring without battery?

Typical Class A Generators, 2 or 3 brush, have an external FLD post. It takes a connection from there to a ground source, via a Voltage Regulator or Low/High light switch manual control, to complete the Field circuit. The beginning of the field circuit (first winding) begins at the third brush,,,,,,,,to and through the first coil,,,,,,,to and through the second coil,,,,,,,,to the FLD post,,,,,,,to ground via the VR or switch

Some Class B Generators Ground the field internally and field current is regulated by varying the voltage on its input.

In all my years as a used tractor dealer and many many makes n models of Generators I had to repair grrrrrrrrrr 2 or 3 brush gennys had external Field posts.

Of course, never say never, since there are different types and brands of gennys out there some 3 brush may use an internal ground and NOT have any FLD post, but of the tons I owned and worked on over the years (all different brands)they sure did.

Re: Generator wiring without battery? in reply to John T, 05-03-2013 17:41:56

Quoting Removed, click Modern View to seeFord, "N" series tractors from 1939 up until 1947 used four different generators having NO Field terminal (only an armature terminal ) & of course ground. Field coils connected to 3rd brush and to ground inside the housing. Used simple cut out, without VR.

I believe thats correct JMOR, of the ones I recall I think it may have been Fords (maybe a few other oddballs) with no external FLD post and suspect they had the internal grounded Field windings I spoke of above. Of the literal hundred of tractors I bought and sold and repaired gennys FEW WERE DARN FORDS I WAS NOT A FORD MAN LOL It was much more typical to have 3 or 4 brush gennys WITH the FLD post fer sure.

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